Installing Drupal

Having trouble with a non-standard configuration of Drupal 9 and relatively new to Drupal as a whole.

I'm looking to have a few Drupal 9 sites all live off the same root domain, for example:

Hi,

The last week i was trying to migrate d7 to d9. I had several errors. Things that worked in D7 didn't work in D9. After deleting some things and adding again some things worked. But i think I must start over.  Is there a way of exporting content from one D9 database to an empty D9 database or must i do it all over and convert all manualy?

Who has some tips?

I tried just  also run

php composer.phar update drupal/core "drupal/core-*" --with-all-dependencies

I got the following messages

Hi , D7 i have installed so that i can go to https://roots.fred-baltus.nl . In that folder i have all the other folders and files needed. Such as sites, themes, modules , etc

Drupal 9 with Docker4Drupal can't work, only my vanila Drupal works. My portainer also not working. I did all the steps. 

1) NGINX_SERVER_ROOT: /var/www/html/web

2) Delete docker-compose.override.yml

3) Drupal 9 as web in root folder

4) default.settings.php to settings.php (Drupal>web>sites>default)

Anyone can point me to another youtube etc?

https://www.youtube.com/watch?v=vOTL3R-jfVs&t=183s

Hi 

Trying to set up Drupal 9.3.4 in AWS EC2 instance (Linux 2)
Have installed the prerequisites PHP 8.0, MariaDB10.5 and Composer 2.6.6.
After installing the Drupal using the command "composer create-project drupal/recommended-project:9.3.4 drupal" and configuring the root directory in httpd.conf file we should be getting the Drupal installer screen to complete the site installation, but instead we are getting this below image

Hello Drupal,

I manage a webshop through Drupal, and I cannot crawl it with any SEO tools. It only crawls the front page and ignores the rest... 

Nothing is blocked in robots.txt etc.... And nothing is configured wrong in the tools (I have tried with a lot of different websites) 

The website in question is fckfanshop.dk 

Regards,

Andreas